Fixture

ABSTRACT

The present invention relates generally to the field of lighting. More particularly, the present invention relates to decorative, reconfigurable or energy and maintenance efficient fluorescent light fixtures that use energy efficient lamps and ballasts, and to an apparatus for new fluorescent light fixtures and for replacing an existing fluorescent light fixture for energy efficient use. Further, the present invention relates to a system that integrates light fixtures with a suspended grid ceiling or a solid ceiling.

CROSS REFERENCE TO RELATED APPLICATION

The present application is a continuation-in-part application of theapplication of Mark Welker, U.S. Ser. No. 11/031,928, filed Jan. 8,2005, entitled FIXTURE AND METHODS.

FIELD OF THE INVENTION

The present invention relates generally to the field of lighting. Moreparticularly, the present invention relates to decorative,reconfigurable or energy and maintenance efficient fluorescent lightfixtures, and to an apparatus for new fluorescent light fixtures and forreplacing an existing fluorescent light fixture for energy efficientuse. Further, the present invention relates to a system that integrateslight fixtures with a suspended grid ceiling or a solid ceiling.

BACKGROUND OF THE INVENTION

Typically in buildings, suspended ceilings having a metallic grid thatsupports panels in grid openings are common. Generally, in suchceilings, direct lighting fixtures replace panels in selected gridopenings to provide room illumination. Such light fixtures are usuallyopen bottom boxes that have a number of fluorescent lamps mounted in thebox, in parallel, with a translucent or parabolic cover on the bottom ofthe box. The box is supported on the grid. In direct lighting, lightfrom the lamps shines directly downward through a translucent orparabolic cover into the room. Generally, the lamps are visible frombelow. Such direct form of fluorescent lighting is relativelyinexpensive, but very plain and utilitarian, without much decorativeeffect or the ability to upgrade to future lamp technologies of variouslengths or quantities and without consideration for simplifying therelated maintenance issues associated with the normal operations of aflorescent lighting fixture.

Also an indirect or reflected type of fluorescent lighting is used withsuspended grid ceilings as well as fixed ceilings. In such indirectlighting, the fluorescent lamps are less visible or cannot be seen, butthe lighting yields a glow over the room, which can be used to achievedesirable decorative effects. Translucent to opaque covers, panes orlenses are normally used with this type of lighting. The light shinesthrough open space into the room after being reflected. In one form ofindirect lighting, the lamps are positioned below the ceiling panels ofthe suspended ceiling, and reflect against the ceiling into the room. Anopaque shield conceals viewing the lamps from the room below. Suchinstallations are generally custom designed and installed, withattendant, generally extensive, expense.

To avoid the expense of custom designing and installing indirectlighting which reflects against the ceiling, indirect lighting fixturescan be supported in grid openings as in direct lighting fixtures. Inthis form of indirect lighting in suspended grid ceilings, the fixturereflects light through a grid opening itself, as in U.S. Pat. No.5,709,460. In the referenced patent, the lamps are positioned above andbehind panels adjacent the openings. The lamps are concealed from view.The light is reflected from a dome over the opening and lamps, into theroom below, through the grid opening. A mask or trim is optionallysecured to the fixture to reduce the area of the opening through whichthe reflected light travels, and to further conceal the lamps from viewfrom below. The fixture, including the reflector dome, rests on the gridbeam flanges.

The light produced by a fluorescent lamp is generated by an electriccurrent being conducted through mercury and inert gases. Fluorescentlighting is generally used, but not always, in indoor applications forboth ambient and task lighting. The most commonly used types offluorescent lamps are 2 foot by 2 foot (2′×2′), 2 foot by 4 foot (2′×4′)and 1 foot by 4 foot (1′×4′) lamps, and others exist of differentdimensions, but the others are not as common when associated withapplications for ambient or task lighting indoors. Fluorescent fixturesand lamps are preferred for ambient and task lighting in large areasbecause their visual efficiency creates less direct glare than doincandescent bulbs, and because fluorescent lighting is several times asenergy efficient as incandescent lighting.

Although fluorescent lamps are generally energy efficient, there aremore efficient lamps that use improved electrodes and coatings whencompared to older fluorescent lamp types. These lamps produce increasedlumen output with improved and substantially lower power consumption.The current lamps can be replaced with energy-saving lamps of lesserwattage and improved visual aspects, but the current fixtures arecurrently restricted by the necessity of having to use the same lengthand configuration of lamps as originally designed by the manufacturer,even when lamps of shorter lengths exist and the shorter lamps wouldallow an even greater improvement in energy savings or more practical toan application task. Also, more energy efficient ballasts are available.These improved ballasts can measurably increase the energy efficiency ofthe fixture.

A large market exists for new light fixtures as well as for theupgrading of existing fluorescent lighting in any appropriateapplications, including but not limited to office buildings, residentialbuildings, warehouses, retail centers, hospitals, airports, schools,colleges, municipal buildings and factories, to install modern energyefficient lamps and ballasts. In addition, many older fluorescent lightfixtures were installed because at that time they were the mostefficient. With today's concern for energy efficiency and costreduction, it is desirable to upgrade a current fluorescent fixture toone having a more energy efficient design related to the applicationtask. When upgrading a fixture, it is important to use a fixture that isflexible and expandable to provide options for future lamp trends andstandards. As used herein, expandability refers to the length of thelamps and the flexibility refers to the number of lamps in each fixture.

Often times, a single building will have a plurality of fixture sizes.At present, a separate different light fixture is required for eachfixture configuration holding one or more fluorescent lamps. In a givenstructure, this may vary from one or two different fixtureconfigurations to a multiple number of configurations, but is typicallynot restricted. Manufacturers must therefore make and stock acommensurate number of individual, different fixture configurations forfluorescent lamps.

There exists, therefore, a need for a fixture apparatus having enhancedexpandability and flexibility with respect to existing structures andthe fixtures therein.

It would therefore be useful to provide a single light fixture that canhold a multiple number of lamp configurations of various fluorescentlamp lengths and lamp types, and thus the fixture is interchangeable.

A feature of the present invention is to provide a light fixture systemwith the capacity to be converted from a direct lighting fixture to anindirect lighting fixture and capable of providing the variousaesthetic, maintenance, and improved efficiencies and options asrequested or required to improve or meet desired task lighting.

A feature of the present invention is to provide a light fixture systemhaving a fixture housing equipped with various removable perforatedslots allowing the fixture the ability to use various lamp lengths, lamptypes and lamp configurations without having to purchase or use a newfixture housing.

A feature of the present invention is to provide a light fixture systemhaving all the necessary parts being removable and re-configurable inthe field or at manufacturing facility to accommodate various lampconfigurations reducing the need for an electrician or other skilledtechnician, or only requiring a non-skilled technician as allowed by therelevant laws or ordnances.

Another feature of the present invention is to provide a light fixturesystem having all the necessary parts being removable andre-configurable in the field or at manufacturing facility to accommodatevarious lamp types, lengths, wattage, sizes and parts while reducing theneed for an electrician or other skilled technician as allowed by therelevant laws or ordnances.

Yet another feature of the present invention is to provide a lightfixture system having all the necessary parts being removable andre-configurable in the field or manufacturing facility to accommodatevarious lamp quantities reducing the need for an electrician or otherskilled technician as allowed by the relevant laws or ordnances.

Another feature of the present invention is to provide a light fixturesystem that can be easily reconfigured without disengaging the fixturefrom the ceiling or, in many cases from, its power source.

Yet another feature of the present invention is to provide a lightfixture system that can be easily serviced without disengaging thefixture from the ceiling or, in many situations from, its power sourceand typically without the need for an electrician, skilled laborer orother qualified technician as allowed by the relevant laws or ordnances.

Another feature of the present invention is to provide a light fixturesystem such that the fixture is easily accessed for replacement ofelectronic parts or other possible maintenance considerations withoutthe need of specialty tools or an electrician, skilled laborer or otherqualified technician as allowed by the relevant laws or ordnances.

Another feature of the present invention is to provide a light fixturesystem that provides for the installation of the fixture of the presentinvention without the removal of the existing fixture housing.

A feature of the present invention is to provide a light fixture systemthat has Shadow Box™ trim that is functional with respect to providingproportionality between the fixture configuration and the lampcharacteristics of type and length.

Another feature of the present invention is to provide a light fixturesystem that has trim that is decorative.

Yet another feature of the present invention is to provide a lightfixture system that has trim, which trim can be made of variousmaterials, colors, textures, cuts, logos and designs.

Yet another feature of the present invention is to provide a lightfixture system that has trim, which trim can be functional forilluminating a logo, image or slogan for advertising, branding orpersonalizing the fixture and the like.

Another feature of the present invention is to provide a light fixturesystem that has trim, which trim can be removed and replaced without theuse of tools, special equipment or a qualified technician.

Another feature of the present invention is to provide a light fixturesystem that has trim, which trim is illuminated by light from the lampsin the fixture or from an auxiliary light source associated with thefixture.

Another feature of the present invention is to provide a light fixturesystem that provides lamp holders for various lamp configurations forseveral different types of lamps with no restriction as to the length ofthe lamp.

Another feature of the present invention is to provide a light fixturesystem for converting a fixture to a different configuration.

Yet another feature of the present invention is to provide a lightfixture system that has trim, which trim is designed for thefunctionality of maximizing the performance parameters of the fixture inregards to but not limited to shorter lamp lengths, lamp positioning,lamp quantities, lens attachment, and other related features necessaryto perform a preferred lighting task such as by way of example indirectlighting.

Yet another feature of the present invention is to provide a lightfixture system that has trim, in regards to but not limited to,advertising a logo, image or slogan, or illuminating or projecting animage for the purpose of personalizing the fixture to customspecifications.

Yet another feature of the present invention is to provide a lightfixture system that has trim for advertising, illuminating or projectingan image for the purpose of personalizing the fixture to customspecifications that uses the lamps incorporated in the fixturespecifications designed for the task.

Yet another feature of the present invention is to provide a lightfixture system that has trim for advertising, illuminating or projectingan image for the purpose of personalizing the fixture to customspecifications that uses an alternate illumination source for thepurpose of illuminating or projecting the image, where such alternateillumination sources are, without limitation, LED lighting, cold cathodedevices, CFLs, fluorescent, and the like.

Yet another feature of the invention is to provide a light fixturesystem where the ballast is mounted to the outside of the fixture so asto be away from the lamps and the associated heat generated thereby forproviding a cooler running temperature for the ballast and lamps so asto optimize energy use, ballast life and lamp life.

Another feature of the present invention is to provide a light fixturesystem that can use various ballast lengths as deemed necessary by thelamp and power requirements.

Yet another feature of the present invention is to provide a lightfixture system wherein the ballast can be changed without the need oftools, special equipment or a skilled technician, i.e., plug and playcharacteristics.

Yet another feature of the present invention is to provide a lightfixture system having a ballast that is mounted on the outside of thefixture which ballast is easily accessed for replacement or maintenance.

Another feature of the present invention is to provide a light fixturesystem that provides a ballast cover that may be mounted on the back ofthe fixture which cover is perforated to allow excess heat to escape inmodels used in a non-insulated area of operation in which the ceilinginsulation does not engage the ballast cover.

Yet another feature of the invention is to provide a light fixturesystem that provides a ballast cover with no openings for use when thefixture is used in an operation where ceiling insulation may contact theballast cover or wiring surfaces of the fixture.

Yet another feature of the present invention is to provide a lightfixture system having a ballast having a heat sink engaged therewith tooptimize energy use, ballast life and lamp life.

Still another feature of the present invention is to provide a lightfixture system adaptable for use with multiple ballasts as well asmultiple ballast lengths and sizes.

Yet still another feature of the present invention is to provide a lightfixture system having an install apparatus that engages the perimeter ofan opening into which a fluorescent fixture will fit for removablyaccepting the fixture.

A feature of the present invention is to provide a light fixture systemhaving an install apparatus upon which an old fixture rests such that anew fixture can be engaged to the install apparatus without removing theold fixture.

Another feature of the present invention is to provide a light fixturesystem having an install apparatus for accepting a fixture which fixturecan be opened by pivoting or disengaging from the install apparatus.

Another feature of the present invention is to provide a light fixturesystem having an install apparatus for associating with the perimeter inwhich the install apparatus is engaged for providing an air return path.

Another feature of the present invention is to provide a light fixturesystem having an install apparatus for accepting a fixture which fixturecan be disengaged and dropped for removal from the install apparatuswith or without pivoting with respect to the install apparatus.

Yet still another feature of the present invention is to provide a lightfixture system having an install extension apparatus that engages theperimeter of an opening into which a fluorescent fixture will fit forremovably accepting the fixture and for lifting a low-profile fixture sothat a deeper, new fixture can be used under the low-profile fixture.

Yet another feature of the present invention is to provide a lightfixture that does not directly engage the ceiling, wall or T-grid intowhich it fits.

Yet another feature of the present invention is to provide a lightfixture that is adapted for use with a surface mount box, which surfacemount box accepts the install apparatus of the present invention.

Yet still another feature of the present invention is to provide a lightfixture that has light guides for directing light through the opening ofa trim member or any desired angle with respect to the Shadow Box™ trim.

Additional features and advantages of the invention will be set forth inpart in the description which follows, and in part will become apparentfrom the description, or may be learned by practice of the invention.The features and advantages of the invention may be realized by means ofthe combinations and steps particularly pointed out in the appendedclaims.

SUMMARY OF THE INVENTION

To achieve the foregoing objects, features, and advantages and inaccordance with the purpose of the invention as embodied and broadlydescribed herein, a light fixture system is provided.

Fixture Housing

The housing is equipped with various removable perforated slots allowingthe fixture the ability to use various lamp lengths, lamp types and lampquantities without having to purchase or use a new housing. All thenecessary/required parts, such as end plates and lamp holders, areremovable and reconfigurable in the field or in the manufacturingfacility to allow various lamp and other necessary light needs to bepreformed. The housing is an apparatus that assembles without the use ofspecialty tools. In addition to providing light reflectivity, theadditional functions of the housing apparatus is to provide theflexibility to configure the light fixture in any desired configurationwith respect to the number of lamps, the length of lamps, the wattage oflamps and any other relevant parameter associated with the configurationof the light fixture.

In one embodiment of the present invention, the fixture rotates out ofthe T-grid with the ballast on the outside of the lamp cavity away fromthe heat associated with the lamps.

Method of assembly: (1) housing, (2) end plates, (3) lock bar, (4)axles, (5) pins with springs, (6) electronics, (7) Shadow Box™ trim, (8)ballast cover, (9) tombstone covers, and (10) lens cover.

A preferred embodiment of the present invention is to rotate out of theceiling to (1) get to the electronics and the lamps, (2) install andremove the fixture, (3) easy maintenance, (4) easily move the entirefixture to another T-grid.

A tombstone/lamp holder is provided. The tombstone/lamp holder isadaptable for use with various lamp configurations and for variousdifferent types of lamps (e.g., T8-T5) but not restricted to any knownlamp.

Ballast Configurations

The ability to use any ballast length and size as deemed necessary bythe lamp and power requirements, and is not restricted to any suchballast.

The ballast can be changed without the need of tools, special equipmentor hard wiring through the use of electrical connectors, and can bedescribed as “plug and play.”

The ballast is preferably mounted on the outside of the fixture, but notlimited to that location, which is easily accessed for replacement ormaintenance, and can be described as “snap-in and snap-out.”

The ballast is mounted to the outside of the fixture away from the lampsand the heat generated which results in a cooler running temperature forthe ballast to optimize energy use, ballast life and lamp life.

Ballast Cover

The ballast cover is mounted on the back of the fixture, but is notlimited to that location, and may be perforated to allow excess heat toescape in models used in a noninsulated area of operation in which theceiling insulation does not cover the ballast cover.

An alternate ballast cover with no openings can be used when the fixtureis used in an operation where ceiling insulation will contact theballast cover or wiring surfaces of the fixture.

Install Apparatus:

The function of the install apparatus is to provide the removableengagement of the light fixture with any ceiling, wall, T-grid or thelike.

The method in which the install apparatus is installed varies with therequired situation. Preferably, the install apparatus can be installedby placing the individual pieces into the aperture associated with theceiling, wall, T-grid or the like.

Alternately, the install apparatus is easily assembled and theninstalled as a complete unit in the aperture associated with theceiling, wall, T-grid or the like utilizing the interlocking panels.

The install apparatus allows the fixture to be easily accessed forreplacement of electronic parts or other possible maintenance needsbecause the light fixture pivots from the install apparatus forproviding easy access to the fixture. In one embodiment, the lightfixture pivots from the channel lock groves of the install apparatus forproviding easy access to the fixture.

Further, the install apparatus provides for the installation of thelight fixture without the removal of the existing fixture, if desired.

The method of using an install apparatus with a light fixture forremoveably affixing the light fixture in a ceiling/wall structure havingan opening therein comprises (1) engaging the perimeter of the openingwith the install apparatus, (2) engaging the light fixture with theinstall apparatus such that the light fixture is removeably engaged withrespect to the ceiling/wall structure, (3) pivoting or disengaging thefixture from the install apparatus for providing easy access to allparts of the fixture for easy operation and maintenance of the fixtureand (4) returning of the fixture to a mounted position during operation.

The method of using a install apparatus with a light fixture forremoveably affixing the light fixture in a ceiling/wall structure havinganother existing light fixture in an opening therein, the methodcomprises (1) disengaging the existing light fixture from the opening ina direction away from the direction the existing fixture casts light,(2) engaging the perimeter of the opening with the install apparatus,and (3) engaging the light fixture with the install apparatus such thatthe light fixture is removeably engaged with the install apparatus andthe existing light fixture is resting on the light fixture which is thusremoveably engaged with respect to the ceiling/wall structure. Further,the fixture by itself can be used with its own “jack-up” kit device.This allows the fixture to be made deeper without changing or installinga “jack up kit” to the install apparatus.

The method of converting an existing light fixture for removeablyaffixing the light fixture in a ceiling/wall structure having an openingtherein, the method comprises (1) removing the back of the fixture, (2)adapting a pivot/hinge/latch mechanism between the fixture and theremoved back and (3) pivoting the back about the mechanism such that theback drops from the opening and can be accessed for maintenance. Thepivoting back could also incorporate the use of tear out tabs forvarious lamp lengths.

The method of converting an existing light fixture for removeablyaffixing the light fixture in a ceiling/wall structure having an openingtherein, the method comprises (1) using the housing of an existingfixture, (2) adapting a pivot/hinge/latch mechanism between the existinghousing and a smaller fixture that fits into the housing and (3)pivoting the smaller fixture about the mechanism such that the smallerfixture pivots or drops from the housing of the existing fixture and canbe accessed for maintenance. Alternately, the present invention providesa method of manufacturing a new light fixture for removeably affixingthe light fixture in a ceiling/wall structure having an opening therein,the method comprises (1) using the housing of a fixture, (2) adapting apivot/hinge/latch mechanism between the housing and a smaller fixturesuch that the smaller fixture fits into the housing and (3) pivoting thesmaller fixture about the mechanism such that the smaller fixture pivotsor drops from the housing and can be accessed for maintenance.

It can be appreciated by those skilled in the art that manyconfigurations are possible and are not limited and many differentconfigurations are available in practicing the present invention.Examples of configurations, without limitation, are: (1) installapparatus, (2) cover plate for ballast cover hole, optional, (3)ballast, optional, (4) lamps; (1) lamps, (2) ballast, (3) installapparatus, (4) wiring harness, optional; and (1) lamps, (2) ballast, (3)install apparatus, (4) wiring harness, optional, (5) plug & playconnectors, optional, (6) blanks for ballast cover and lamp holders.

Shadow Box™ Trim

The Shadow Box™ trim can be removed and attached to the light fixturewithout tools or attachment mechanisms. One Shadow Box™ trim is easilyinterchanged with another Shadow Box™ trim. The Shadow Box™ trimprovides decorative trim which can be made of various materials, colors,textures, designs and other characteristics. The Shadow Box™ trim can bemanufactured with corporate logos or other branding or advertisingdesigns and is not limited to corporate designs. For example, graphicdesigns, images of animals, equipment, directions, and the like can beadapted for use with the Shadow Box™ trim. The Shadow Box™ trim can berotated and laid into place so as to be removed and replaced withoutbeing lifted above the T-grid.

The Shadow Box™ trim can also provide a means for an indirect lightingapparatus. Further, the Shadow Box™ trim can be used with a ceilingmount apparatus to place a light fixture on a solid ceiling or wall.

Thus, the Shadow Box™ trim can be of any color, texture, material orother characteristic. More particularly, but without limitation, theShadow Box™ trim can be plain, bear a design, bear a picture of ananimal, person, figure, or any other item, bear a logo, bear aparticular branding, or convey advertising, all referred to simply asthe design. The Shadow Box™ trim provides that the design therein can beilluminated. The illumination of the design in the Shadow Box™ trim canbe provided by the lamps associated with the light fixture. Also, thedesign in the Shadow Box™ trim can be illuminated by an alternate lightsource. Examples of such alternate light sources are, withoutlimitation, LEDs, lasers, cold cathode devices, CFLs and the like. Thedesign in the Shadow Box™ trim can be displayed in different colors. Thecoloring of the design can be achieved by using colored mylar film,colored LEDs, prisms, or the like. The Shadow Box™ trim has quickrelease hinge tabs to easily pivot, remove and replace the trim.

Methods:

One embodiment of the present invention is a method of installing alight fixture. The method of installing a light fixture as practiced bythe present invention into an aperture in a ceiling, wall or box wherethe aperture is defined by a perimeter comprises the steps of engagingan install apparatus with the perimeter of the aperture, engaging afixture in a hanging relationship with the install apparatus, connectinga power source to the fixture, rotating the hanging fixture until thefixture is operational or functional with the perimeter of the aperture,securing the fixture in a flush or operational relationship with theperimeter of the aperture, and providing power to the fixture forlighting the fixture.

Another embodiment of the present invention is a method of changing alamp in a light fixture. The method of changing a lamp in a lightfixture as practiced by the present invention wherein the light fixtureis engaged in a pivotal relationship by a trim member comprises thesteps of disengaging a latch mechanism between the fixture and the trimmember which latch mechanism removably secures the trim member to thefixture, pivoting the trim member away from the fixture such that thelamp in a cavity in the fixture is exposed and the trim member ishanging from a portion of the fixture, removing the old lamp from thecavity, and engaging a new lamp in the cavity of the fixture withoutdisplacing any other lamps or components, pivoting the trim member forsecuring the lamp in the cavity, and engaging the latch mechanism forsecuring the trim member to the fixture.

Yet another embodiment of the present invention is a method of changinga ballast. The method of changing a ballast in a light fixture aspracticed by the present invention wherein the light fixture is engagedin a pivotal relationship with an install apparatus comprising the stepsof disengaging a latch mechanism between the fixture and the installapparatus which latch mechanism removably secures the fixture to theinstall apparatus, pivoting the fixture away from the install apparatussuch that the ballast cover is exposed and the fixture is hanging from aportion of the install apparatus, removing the ballast cover and the oldballast from the fixture, engaging a new ballast and the ballast coveron the fixture, pivoting the fixture for engagement with the installapparatus, and engaging the latch mechanism for securing the fixture tothe install apparatus.

Yet still another embodiment of the present invention is a method ofchanging the location of a tombstone holder with respect to a fixture.The method of changing the location of a tombstone holder with respectto a fixture as practiced by the present invention comprises the stepsof accessing the tombstone holder, releasing the tombstone holder fromthe fixture housing, relocating the tombstone holder to anotherlocation, securing the tombstone holder to the fixture housing at thenew location.

Still another embodiment of the present invention is a method of using aShadow Box™ trim or trim member with a light fixture. The method ofusing a Shadow Box™ trim or trim member with a light fixture aspracticed by the present invention wherein the light fixture is engagedin a pivotal relationship by a trim member comprising the steps ofdisengaging a latch mechanism between the fixture and the trim memberwhich latch mechanism removably secures the trim member to the fixture,pivoting the trim member away from the fixture such that the trim memberis hanging from a portion of the fixture, removing the trim member fromthe fixture, engaging a new trim member with the fixture, pivoting thetrim member for removably engaging the fixture, engaging the latchmechanism for securing the trim member to the fixture.

Yet another embodiment of the present invention is a method ofinstalling an install apparatus in a T-grid. The method of installing aninstall apparatus in a T-grid as practiced by the present inventioncomprises the steps of engaging a first lateral member in congruencewith a first lateral side of the T-grid, engaging a second lateralmember in congruence with a second lateral side of the T-grid, engaginga first longitudinal member in congruence with a first longitudinal sideof the T-grid, interlocking the first lateral member and the firstlongitudinal, interlocking the second lateral member and the firstlongitudinal, engaging a second longitudinal member in congruence with asecond longitudinal side of the T-grid, interlocking the first lateralmember and the second longitudinal member, interlocking the secondlateral member and the second longitudinal member such that the lateralmembers and the longitudinal members define the install apparatus.

Another embodiment of the present invention is a method of changing thelamp configurations or the lamp quantities comprising the steps ofaccessing the tombstone holder, releasing the tombstone holder from thefixture housing, engaging a new tombstone holder with the desired numberof tombstones, and securing the new tombstone holder to the fixturehousing.

Yet another embodiment of the present invention is a method of using alight fixture extension as practiced by the present invention forplacement into an aperture in a ceiling, wall or box where the apertureis defined by a perimeter comprises the steps of removing trim memberfrom the fixture, disengaging the fixture from the install apparatus viaa latch mechanism between the fixture and the install apparatus,removing the existing hardware, replacing the hardware onto anextension, attaching the extension to the fixture to the correctcorresponding positions, adding an end extension to the end plates,replacing the fixture for engagement into the install apparatus via alatch mechanism between the fixture and the install apparatus, andreplacing the trim member and locking into position.

Yet still another embodiment of the present invention is a method ofusing an install apparatus extension as practiced by the presentinvention for placement into an aperture in a ceiling, wall or box wherethe aperture is defined by a perimeter comprises the steps of removingthe fixture from the install apparatus, removing the install apparatusfrom the opening and attaching extension elements to the installapparatus, replacing the install apparatus into the ceiling or wallcavity, and replacing the fixture and engaging into the installapparatus via a latch mechanism between the fixture and the installapparatus.

Still another embodiment of the present invention is a method ofadapting a light fixture as practiced by the present invention forcasting indirect light comprises the steps of removing the trim member,removing the lamps, lowering the fixture from the install apparatus,removing the electronics, adding the new electronics, rotating thefixture back into the install apparatus, securing the fixture into theinstall apparatus, installing the indirect reflective shield, adding thelamps, attaching the indirect apparatus to trim member, attaching thetrim member to the fixture, and rotating the trim member into thefixture and securing it in place.

Yet still another embodiment of the present invention is a method ofusing an install apparatus with a light fixture as practiced by thepresent invention. The method of using an install apparatus with a lightfixture as practiced by the present invention for placement into anaperture in a ceiling, wall or box where the aperture is defined by aperimeter comprises the steps of pushing the existing fixture up,engaging an install apparatus with the perimeter of the aperture,engaging a fixture in a pivotally hanging relationship with the installapparatus such that the existing fixture is resting above the fixtureand the install apparatus, connecting a power source to the fixture,rotating the hanging fixture until the fixture is operational with theperimeter of the aperture, securing the fixture in a flush oroperational relationship with the perimeter of the aperture, andproviding power to the fixture for lighting the fixture.

Yet another feature of the present invention is to provide a lightfixture system for providing indirect light having an installationapparatus that engages the perimeter of an opening into a trim memberwhere an indirect lighting cover/mechanism can be attached without theaid of specialty tools or skilled labor for converting the directlighting configuration into an indirect light configuration.

Yet still another feature of the present invention is to provide a lightfixture system having an installation apparatus that converts theelectrical components from a direct lighting system into an indirectlighting system without the aid of specialty tools or skilled labor.

Additional advantages and modification will readily occur to thoseskilled in the art. The invention in its broader aspects is thereforenot limited to the specific details, representative apparatus, and theillustrative examples shown and described herein. Accordingly, thedepartures may be made from the details without departing from thespirit or scope of the disclosed general inventive concept.

BRIEF DESCRIPTION OF THE DRAWINGS

The accompanying drawings which are incorporated in and constitute apart of the specification, illustrate preferred embodiments of theinvention and together with the general description of the inventiongiven above and the detailed description of the preferred embodimentgiven below, serve to explain the principles of the invention.

FIG. 1 is a perspective view of a preferred embodiment of the lightfixture apparatus of the present invention with the Shadow Box™ trimpivoted from and disposed at a 90 degree angle to the fixture/troffer.

FIG. 2 is a perspective view of a preferred embodiment of the lightfixture apparatus of the present invention with the fixture/trofferpivoted from and disposed at a 90 degree angle to the install apparatuswhich is engaged with a T grid.

FIG. 3 is a perspective view of a preferred embodiment of the lightfixture apparatus of the present invention showing the fixture/troffer,the Shadow Box™ trim and the install apparatus.

FIG. 4 is a perspective view of a preferred embodiment of the housingassociated with the light fixture apparatus of the present invention.

FIG. 5 is a plan view of the back side a preferred embodiment of thehousing associated with the light fixture apparatus of the presentinvention.

FIG. 5A is a plan view of the back side another preferred embodiment ofthe housing associated with the light fixture apparatus of the presentinvention.

FIG. 6 is an end view of a preferred embodiment of the housingassociated with the light fixture apparatus of the present invention.

FIG. 6A is an end view of another preferred embodiment of the housingassociated with the light fixture apparatus of the present invention.

FIG. 7 is a plan view of a preferred embodiment of the Shadow Box™ trimassociated with the light fixture apparatus of the present invention.

FIG. 8 is a perspective view of a preferred embodiment of latchmechanism associated with the light fixture apparatus of the presentinvention.

FIG. 9 is a perspective view of another preferred embodiment of latchmechanism associated with the light fixture apparatus of the presentinvention.

FIG. 10 is a perspective view of a preferred embodiment of ballast coverassociated with the light fixture apparatus of the present invention.

FIG. 11 is a perspective view of a preferred embodiment of ballast coverassociated with the light fixture apparatus of the present inventionthat provides for the venting of heat from the ballast cover.

FIG. 12 is a perspective view of a preferred embodiment of the lightfixture apparatus of the present invention engaged with a T-grid as seenfrom below illustrating the promotional use of a logo with the ShadowBox™ trim.

FIG. 13 is a perspective view of a preferred embodiment of the lightfixture apparatus of the present invention engaged with a T-grid as seenfrom below illustrating the promotional use of a design with the ShadowBox™ trim.

FIG. 14 is a flow chart illustrating a preferred embodiment of themethod of installing a light fixture as practiced by the presentinvention.

FIG. 15 is a flow chart illustrating a preferred embodiment of themethod of changing a lamp as practiced by the present invention.

FIG. 16 is a flow chart illustrating a preferred embodiment of themethod of changing a ballast as practiced by the present invention.

FIG. 17 is a flow chart illustrating a preferred embodiment of themethod of changing the location of a tombstone holder with respect to afixture as practiced by the present invention.

FIG. 18 is a flow chart illustrating a preferred embodiment of themethod of using a shadow box with a light fixture as practiced by thepresent invention.

FIG. 19 is a flow chart illustrating a preferred embodiment of themethod of installing an install apparatus as practiced by the presentinvention.

FIG. 20 is a flow chart illustrating a preferred embodiment of themethod of changing the lamp configurations or the lamp quantities aspracticed by the present invention.

FIG. 21 is a flow chart illustrating a preferred embodiment of themethod of changing the lamp types as practiced by the present invention.

FIG. 22 is a flow chart illustrating a preferred embodiment of themethod of using a light fixture extension as practiced by the presentinvention.

FIG. 23 is a flow chart illustrating a preferred embodiment of themethod of using an install apparatus extension as practiced by thepresent invention.

FIG. 24 is a flow chart illustrating a preferred embodiment of themethod of adapting a light fixture as practiced by the present inventionfor casting indirect light.

FIGS. 25A, 25B, 25C, 25D are perspective views of a preferred embodimentof an indirect lighting trim for use with the light fixture apparatus ofthe present invention.

FIG. 26 is a perspective view of a preferred embodiment of a ballastrail of the present invention.

FIG. 27 is an end view of the preferred embodiment of a ballast rail ofthe present invention as illustrated in FIG. 26.

FIG. 28 is a longitudinal view of the preferred embodiment of a ballastrail of the present invention as illustrated in FIG. 26.

FIG. 29 is a plan view of the preferred embodiment of a ballast rail ofthe present invention as illustrated in FIG. 26 engaged with a collet.

FIG. 30 is a plan view of the preferred embodiment of the collet of thepresent invention as illustrated in FIG. 29.

FIG. 31 is a perspective view of a preferred embodiment of a latch barof the present invention.

FIG. 31A is a longitudinal view of the preferred embodiment of the latchbar of the present invention as illustrated in FIG. 31.

FIG. 31B is a detail view of the preferred embodiment of the latch barof the present invention as illustrated in FIG. 31A.

FIG. 31C is a longitudinal, break-away view of the preferred embodimentof the latch bar of the present invention as illustrated in FIG. 31.

FIG. 31D is a detail view of the preferred embodiment of the latch ofthe latch bar of the present invention as illustrated in FIG. 31A.

FIG. 32A is a perspective view of the preferred embodiment of the lensreceiver guide of the present invention.

FIG. 32B is an elevation view of the preferred embodiment of the lensreceiver guide of the present invention as illustrated in FIG. 32A.

FIG. 32C is a plan view of the preferred embodiment of the lens receiverguide of the present invention as illustrated in FIG. 32A.

FIG. 33A is a perspective view of a preferred embodiment of the lensclip of the present invention.

FIG. 33B is an elevation view of the preferred embodiment of the lensclip of the present invention as illustrated in FIG. 33A.

Additional advantages and modification will readily occur to thoseskilled in the art. The invention in its broader aspects is thereforenot limited to the specific details, representative apparatus, and theillustrative examples shown and described herein. Accordingly, thedepartures may be made from the details without departing from thespirit or scope of the disclosed general inventive concept.

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS

The above general description and the following detailed description aremerely illustrative of the generic invention, and additional modes,advantages, and particulars of this invention will be readily suggestedto those skilled in the art without departing from the spirit and scopeof the invention.

FIG. 1 is a perspective view of a preferred embodiment of the lightfixture apparatus 100 of the present invention with the Shadow Box™ trim300 pivoted from and disposed at a 90 degree angle to thefixture/troffer 200. The fixture/troffer 200 and the Shadow Box™ trim300 have a detachable relationship as well as a pivoting relationship.Thus, the Shadow Box™ trim 300 can either be removed completely from thefixture/troffer 200, or the Shadow Box™ trim 300 can be in a pivotingrelationship with the fixture/troffer 200.

The fixture/troffer 200 comprises a base 202, end plates 204, lampholder covers 206, a ballast cover 208, a fixture release mechanism 210and a pivot member 212 for the fixture/troffer 200. The base 202 has aconvexed surface 202A and a concaved surface 202B. The end plates 204have an outer surface 204A and an inner surface 204B. The concavedsurface 202B of the base 202 and the inner surfaces 204B of the endplates 204 form a cavity 203. The cavity 203 accepts one or more lamps12. The lamps are held in place by a plurality of lamp holders ortombstones 205.

The Shadow Box™ trim 300 comprises a perimeter structure 310, a pivotmember 312, a display surface 314, an engaging mechanism 320 and a lens330. The pivot member 312 of the Shadow Box™ trim 300 removeably engagesthe perimeter of the base 202 of the fixture/troffer 200 such that theShadow Box™ trim 300 pivots about a perimeter of the fixture/troffer200. In FIG. 1, the Shadow Box™ trim 300 is illustrated to be in anopen-pivoted relationship with and disposed at a 90 degree angle to thefixture/troffer 200. It can be readily appreciated that the Shadow Box™trim 300 can be moved about the pivot member 312 to be in aclosed-pivoted relationship with the fixture/troffer 200. The ShadowBox™ trim 300 is held in a closed-pivoted relationship with thefixture/troffer 200 by the engaging mechanism 320 interacting with therelease mechanism 220.

FIG. 2 is a perspective view of a preferred embodiment of the lightfixture apparatus 100 of the present invention with the fixture/troffer200 pivoted from and disposed at a 90 degree angle to the installapparatus 400 which is engaged with a T grid 10. The fixture/troffer 200and the install apparatus 400 have a detachable relationship as well asa pivoting relationship. Thus, the fixture/troffer 200 can either beremoved completely from the install apparatus 400, or thefixture/troffer 200 can be in a pivoting relationship with the installapparatus 400.

The fixture/troffer 200 illustrated in FIG. 2 shows the concaved side202A. The fixture/troffer 200 is illustrated with the lamp holder covers206, the tombstone holders 207, the ballast 20, the powersource-to-ballast connectors 260, the ballast-to-tombstone connectors270, the convexed surface 202A of the base 202, the ballast cover 208and the ventilation grid 209 in the ballast cover 208.

The install apparatus 400 is shown engaged with the T-grid 10. Theinstall apparatus 400 includes the lateral members 410A, 410B and thelongitudinal members 430A, 430B [latter not shown]. The longitudinalmembers 430A, 430B of the install apparatus 400 are illustrated engaginglongitudinal portions of the T-grid 10. The longitudinal members 430A,430B are preferably made of angled material such as for example U-shapedmetal. Particularly, the longitudinal member 430A shown in FIG. 2illustrates the concaved side thereof with a smaller side engaging theT-grid 10 and the other smaller side remote from the T-grid 10. Thelongitudinal members 430A, 430B may have one or more extensions from aremote end for removeably engaging the lateral members 410A, 410B, suchas one or more extensions [not shown]. The extensions protruding fromthe longitudinal members 430A, 430B can be configured to be accepted inthe respective lateral members 410A, 410B to form a detent [not shown]at an end location 422 for locking the movement of the lateral members410A, 410B and the longitudinal members 430A, 430B. Also, the end remotefrom the detent may be secured to the T-grid 10 by use of a screw in theholes 412 illustrated in the lateral members 410A, 410B and thelongitudinal members 430A, 430B or by any other conventional securingmechanism.

Of importance is the channel-lock feature of the fixture/troffer 200relative to the install apparatus 400. The fixture/troffer 200 has thepivot member 212 extending from one side of its perimeter. The pivotmember 212 has at both its extremities an expanded portion that has alarger radial dimension than the main portion of the pivot member 212.The install apparatus 400 has one or more slots 414 in each lateralmember 410A, 410B. The slot 414 has a larger portion 414A and a smallerportion 414B. The larger portion 414A is for receiving there through theexpanded portion of the pivot member 212. As the pivot member 212 ispushed from the larger portion 414A into the smaller portion 414B of thelateral member 410A, 410B, the pivot member 212 is secured in thesmaller portion 414B of the lateral members 410A, 410B such that theexpanded portion of the pivot member 212 is on one side of the lateralmembers 410A, 410B and the main portion of the pivot member 212 alongwith the fixture/troffer 200 are on the other side of the lateralmembers 410A, 410B such that the fixture/troffer 200 is encompassed bythe pivot member 212. Also illustrated is alternate slot 415 which canbe used in place of the slot 414. It can be appreciated by those skilledin the art that alternate means are or could be available to perform thesame function as the channel-lock feature of the present invention andsuch alternate means are encompassed by the present invention.

Also of importance is the pivoting of the fixture/troffer 200 about thepivot member 212 such that the fixture release mechanism 210 [see FIG.1] is removably engaged with the install apparatus 400 such that thefixture/troffer 200 is held in place within the T-grid 10 on the surface420.

FIG. 3 is a perspective view of a preferred embodiment of the lightfixture apparatus 100 of the present invention showing thefixture/troffer 200, the Shadow Box™ trim 300 and the install apparatus400. The install apparatus 400 is illustrated with the lateral members410 and the longitudinal members 430. The Shadow Box™ trim 300 isillustrated with the perimeter structure 310 and the display surface314. The fixture/troffer 200 includes the base 202, the end plates 204,the lamp holder covers 206, the ballast cover 208 and the lock barassembly 220. The base 202 has a plurality of tombstone adjustment slots232 and one or more ballast slots 234. The tombstone adjustment slots232 are provided in the form of knock-outs so that, depending on thelength of the lamp to be used with the light fixture apparatus 100, thetombstone adjustment slots 232 corresponding to the lamp length used canbe knocked out. Thus, it is appreciated by those skilled in the art thatany lamp length or combination there of can be used with the lightfixture apparatus 100 of the present invention. Similarly, the ballastadjustment slot 234 is provided for use with a ballast retainer [seeFIG. 5] and ballast clip [not shown]. The ballast retainer provides thata conventional ballast having a projected portion can be slid under theballast retainer for securing one end of the ballast. The ballast clipslideably engages the ballast adjustment slot 234 and the ballast forsecuring the ballast, regardless of size and shape, between the ballastretainer, the base 202 and the ballast clip. The ballast cover 208 has aventilation grid 209.

FIG. 4 is a perspective view of a preferred embodiment of the housing orbase 202 associated with the light fixture apparatus 100 of the presentinvention. FIG. 4 illustrates the ability of the light fixture apparatus100 of the present invention to be adapted for use with any lamp and anyballast. The ability to adapt to any lamp is derived from the ability tolocate the tombstones 205 [see FIG. 1] that hold the lamps at anylocation, and thus, for accepting a lamp of any dimension, regardless oflength or radius. The tombstone adjustment slots 232A, 232AA areprovided for holding tombstones at the greatest distance apart, andthus, for accepting a lamp of maximum length for the base 202 shown. Theintermediate tombstone adjustment slots 232B, 232BB are provided forholding tombstones at an intermediate distance apart, and thus, foraccepting a lamp of intermediate length for the base 202 shown. Thetombstone adjustment slots 232C, 232CC are provided for holdingtombstones at the shortest distance apart, and thus, for accepting alamp of a minimum length for the base 202 shown. Since the tombstoneadjustment slots 232 span the width of the base 202, tombstones 205 canbe placed in any number across the base 202 with a lamp associated witheach remote pair of tombstones 205. The limiting factor with respect tothe number of lamps that can be adapted for use in the light fixtureapparatus 100 of the present invention is that the sum of the diametersof all the lamps is less that the length of the respective tombstoneadjustment slots 232. A ballast adjustment slot 234 is illustrated inthe convexed surface 202A to operate in a similar manner as do thetombstone adjustment slots 232.

FIG. 5 is a plan view of the preferred embodiment of the concavedsurface 202B of the housing 202 associated with the light fixtureapparatus 100 of the present invention as illustrated in FIG. 4. Thetombstone adjustment slots 232A, 232AA, 232C, 232CC for the maximumlength lamp and the minimum length lamps are illustrated as knock-outs.The tombstone adjustment slots 232B, 232BB for the intermediate lengthlamps are illustrated as slots ready to accept the tombstones 205 whichare secured by the tombstone holders 207 as illustrated in FIG. 2. Theballast adjustment slot 234 is provided for use with a ballast retainer[in line with the ballast adjustment slot 234] and the ballast clip [notshown]. The ballast retainer provides that a conventional ballast havinga projected portion can be slid under the ballast retainer for securingone end of the ballast. The ballast clip slideably engages the ballastadjustment slot 234 and the ballast for securing the ballast, regardlessof size and shape, between the ballast retainer, the base 202 and theballast clip. As is appreciated by those skilled in the art, the ballastclip can be any configuration which effects the removable engagement ofthe ballast with the ballast retainer, the base 202 and the ballastclip.

FIG. 6 is an end view of a preferred embodiment of the housing 202associated with the light fixture apparatus 100 of the presentinvention. The housing 202 is illustrated to view the convexed portion202A of the housing 202 with the cancaved portion 202B of the housing202. The extremities illustrated in FIG.6 are illustrated in FIGS. 8 and9 to better illustrate possible release mechanisms.

FIG. 5A is a plan view of the back side another preferred embodiment ofthe housing 1202 associated with the light fixture apparatus of thepresent invention. The housing 1202 comprises a concaved portion 1202B,a first angled portion 1203, a second angled portion 1205, a thirdangled portion 1207, a planer portion 1209 and a flat portion 1211. Theconcaved portion 1202B has therein a plurality of tombstone adjustmentslots 1232A, 1232AA, 1232B, 1232BB, 1232C, 1232CC. The planer portion1209 comprises one or more knock-outs 1241. Also, the planer portion1209 comprises one or more T-shaped apertures 1243 that are engagingand/or pivoting points for engaging elements. Further, the planerportion 1209 comprises one or more apertures 1245.

FIG. 6A is an end view of another preferred embodiment of the housing1202 associated with the light fixture apparatus of the presentinvention. The housing 1202 comprises a concaved portion 1202B, aconvexed portion 1202A, a first angled portion 1203, a second angledportion 1205, a third angled portion 1207, a planer portion 1209 and aflat portion 1211.

FIG. 7 is a plan view of a preferred embodiment of the Shadow Box™ trim300 associated with the light fixture apparatus 100 of the presentinvention. The Shadow Box™ trim 300 comprises a perimeter structure 310,a display surface 314, a light opening 330A, a pivot member 312A and anengaging mechanism 320.

The Shadow Box™ trim 300 can be removed and attached to the lightfixture 100 without tools or attachment mechanisms. Any Shadow Box™ trim300 is easily interchanged with another Shadow Box™ trim 300. The ShadowBox™ trim 300 provides decorative trim which can be made of variousmaterials, colors, textures and designs to depict corporate logos orother branding or advertising designs. The Shadow Box™ trim 300 may be,but not required to be, rotated and laid into place so as to be removedand replaced without being lifted above the T-grid. The Shadow Box™ trim300 can also provide a means for an indirect lighting apparatus.Further, the Shadow Box™ trim 300 can be adapted for use with anyfixture.

More particularly, but without limitation, the Shadow Box™ trim 300 canbe plain, bear a design, bear a picture, bear a logo, bear a particularbranding, or convey advertising, all referred to simply as the design.The Shadow Box™ trim 300 provides that the design therein can beilluminated. The illumination of the design in the Shadow Box™ trim 300can be provided by the lamps associated with the light fixture. Also,the design in the Shadow Box™ trim 300 can be illuminated by analternate light source. Examples of such alternate light sources are,without limitation, LEDs, lasers, cold cathode devices, CFLs and thelike. The design in the Shadow Box™ trim 300 can be displayed indifferent colors. The coloring of the design can be achieved by usingcolored mylar film, colored LEDs, prisms, or the like. The Shadow Box™trim 300 has quick release-engaging mechanism 320 to easily pivot,remove and replace the Shadow Box™ trim 300.

FIG. 8 is a perspective view of a preferred embodiment of latchmechanism 225 associated with the light fixture apparatus 100 of thepresent invention.

FIG. 9 is a perspective view of another preferred embodiment of latchmechanism 226 associated with the light fixture apparatus 100 of thepresent invention.

FIG. 10 is a perspective view of a preferred embodiment of the ballastcover 208 associated with the light fixture apparatus 100 of the presentinvention. The ballast cover 208 is an elongate member such that anysize ballast can be covered. The ballast cover 208 has open knock-outs208A for accepting the tombstone holder cover for the lamp holders 206.Further, the ballast cover 208 has closed knock-outs 208B which areavailable for knocking out and thereafter for accepting the tombstoneholder cover for the lamp holders 206. Typically, the ends of theballast cover 208 are closed. Also, the ballast cover 208 has an openingbetween the open knock-outs 208A for accepting power from a remote powersource.

FIG. 11 is a perspective view of a preferred embodiment of ballast cover208 associated with the light fixture apparatus 100 of the presentinvention that provides for the venting of heat from the ballast cover208 by a ventilation grid 209. The ballast cover 208 has open knock-outs208A for accepting the tombstone holder cover for the lamp holders 206.Further, the ballast cover 208 has closed knock-outs 208B which areavailable for knocking out and thereafter for accepting the tombstoneholder cover for the lamp holders 206.

FIG. 12 is a perspective view of a preferred embodiment of the lightfixture apparatus 100 of the present invention engaged with a T-grid 10as seen from below illustrating the promotional use of a logo 340 withthe Shadow Box™ trim 300. The logo 340 is in the display surface 314 ofthe Shadow Box™ trim 300. The logo 340 can be lighted by the lamps inthe fixture/troffer 200, or alternately, can be lighted by auxiliarymeans so the logo 340 remains illuminated when the lamps in the lightfixture apparatus 100 are off.

FIG. 13 is a perspective view of a preferred embodiment of the lightfixture apparatus 100 of the present invention engaged with a T-grid 10as seen from below illustrating the promotional use of a design 350 withthe Shadow Box™ trim 300. The design 350 is in the display surface 314of the Shadow Box™ trim 300. The design 350 can be lighted by the lampsin the fixture/troffer 200, or alternately, can be lighted by auxiliarymeans so the design 350 remains illuminated when the lamps in the lightfixture apparatus 100 are off.

FIG. 14 is a flow chart illustrating a preferred embodiment of themethod of installing a light fixture as practiced by the presentinvention. The method of installing a light fixture as practiced by thepresent invention into an aperture in a ceiling, wall or box where theaperture is defined by a perimeter comprises the steps of engaging aninstall apparatus with the perimeter of the aperture, engaging a fixturein a hanging relationship with the install apparatus, connecting a powersource to the fixture, rotating the hanging fixture until the fixture isoperational with the perimeter of the aperture, securing the fixture ina operational relationship with the perimeter of the aperture, andproviding power to the fixture for lighting the fixture.

FIG. 15 is a flow chart illustrating a preferred embodiment of themethod of changing a lamp in a light fixture as practiced by the presentinvention. The method of changing a lamp in a light fixture as practicedby the present invention wherein the light fixture is engaged in apivotal relationship by a trim member comprising the steps ofdisengaging the trim member from the fixture to expose a lamp cavity,pivoting the trim member away from the fixture such that the lamp in acavity in the fixture is exposed and the trim member is hanging from aportion of the fixture, removing the old lamp from the cavity, andengaging a new lamp in the cavity without displacing any other lamp orcomponent, pivoting the trim member for securing the lamp in the cavity,and engaging the latch mechanism for securing the trim member to thefixture.

FIG. 16 is a flow chart illustrating a preferred embodiment of themethod of changing a ballast as practiced by the present invention. Themethod of changing a ballast in a light fixture as practiced by thepresent invention wherein the light fixture is engaged in a pivotalrelationship with an install apparatus comprising the steps ofdisengaging a latch mechanism between the fixture and the installapparatus, pivoting the fixture away from the install apparatus toexpose the ballast area, removing the old ballast from the fixture,engaging a new ballast on the fixture, pivoting the fixture forengagement with the install apparatus, and securing the fixture to theinstall apparatus.

FIG. 17 is a flow chart illustrating a preferred embodiment of themethod of changing the location of a tombstone holder with respect to afixture for changing lamps having different lengths as practiced by thepresent invention. The method of changing the location of a tombstoneholder with respect to a fixture for changing lamps having differentlengths comprising the steps of accessing the tombstone holder,releasing the tombstone holder from the fixture housing, relocating thetombstone holder to another location, and securing the tombstone holderto the fixture housing at the new location.

FIG. 18 is a flow chart illustrating a preferred embodiment of themethod of using a Shadow Box™ trim or trim member with a light fixtureas practiced by the present invention. The method of using a Shadow Box™trim or trim member with a light fixture as practiced by the presentinvention wherein the light fixture is engaged in a pivotal relationshipby a trim member comprising the steps of disengaging a latch mechanismbetween the fixture and the trim member which latch mechanism removablysecures the trim member to the fixture, pivoting the trim member awayfrom the fixture such that the trim member is hanging from a portion ofthe fixture, removing the trim member from the fixture, engaging a newtrim member with the fixture, pivoting the trim member for removablyengaging the fixture, and engaging the latch mechanism for securing thetrim member to the fixture.

FIG. 19 is a flow chart illustrating a preferred embodiment of themethod of installing an install apparatus in a T-grid as practiced bythe present invention. The method of installing an install apparatus ina T-grid as practiced by the present invention comprising the steps ofengaging a first lateral member in congruence with a first lateral sideof the T-grid, engaging a second lateral member in congruence with asecond lateral side of the T-grid, engaging a first longitudinal memberin congruence with a first longitudinal side of the T-grid, interlockingthe first lateral member and the first longitudinal, interlocking thesecond lateral member and the first longitudinal, engaging a secondlongitudinal member in congruence with a second longitudinal side of theT-grid, interlocking the first lateral member and the secondlongitudinal member, interlocking the second lateral member and thesecond longitudinal member such that the lateral members and thelongitudinal members define the install apparatus.

FIG. 20 is a flow chart illustrating a preferred embodiment of themethod of changing the lamp configurations or the lamp quantities aspracticed by the present invention. The method of changing the lampconfigurations or the lamp quantities comprises the steps of accessingthe tombstone holder, releasing the tombstone holder from the fixturehousing, engaging a new tombstone holder with the desired number oftombstones and securing the new tombstone holder to the fixture housing.

FIG. 21 is a flow chart illustrating a preferred embodiment of themethod of changing the lamp types as practiced by the present invention.The method of changing the lamp types comprises the steps of accessingthe tombstone holder, releasing the tombstone holder from the fixturehousing, removing the existing tombstone, engaging in the tombstoneholder a new tombstone for use with the new lamp type and securing thetombstone holder to the fixture housing.

FIG. 22 is a flow chart illustrating a preferred embodiment of themethod of using a light fixture extension as practiced by the presentinvention. The method of using a light fixture extension as practiced bythe present invention for placement into an aperture in a ceiling, wallor box where the aperture is defined by a perimeter comprising the stepsof removing a trim member from the fixture, disengaging the fixture fromthe install apparatus via a latch mechanism between the fixture and theinstall apparatus, removing the existing hardware, replacing thehardware onto the fixture extensions, attaching the fixture to thefixture extensions to the correct corresponding positions, adding an endplate extension to the end plates, replacing the fixture for engagementinto the install apparatus via a latch mechanism between the fixture andthe install apparatus, and replacing the trim member and locking intoposition.

FIG. 23 is a flow chart illustrating a preferred embodiment of themethod of using an install apparatus extension as practiced by thepresent invention. The method of using an install apparatus extension aspracticed by the present invention for placement into an aperture in aceiling, wall or box where the aperture is defined by a perimetercomprises the steps of removing the fixture from the install apparatus,removing the install apparatus from the opening and attaching extensionsto the install apparatus, replacing the install apparatus into theceiling or wall cavity, and replacing the fixture and engaging into theinstall apparatus via a latch mechanism between the fixture and theinstall apparatus.

FIG. 24 is a flow chart illustrating a preferred embodiment of themethod of adapting a light fixture as practiced by the present inventionfor casting indirect light. The method of adapting a light fixture aspracticed by the present invention for casting indirect light comprisingthe steps of, removing the trim member, removing the lamps, lowering thefixture from the install apparatus, removing the electronics, adding thenew electronics, rotating the fixture back into the install apparatus,securing the fixture into the install apparatus, installing the indirectreflective shield, adding the lamps, attaching the indirect apparatus totrim member, attaching the trim member to the fixture, and rotating thetrim member into the fixture and securing it in place.

FIGS. 25A, 25B, 25C, 25D are perspective views of a preferred embodimentof an indirect lighting trim 500 for use with the light fixtureapparatus 100 of the present invention. FIGS. 25A, 25B, 25C, 25Dillustrate the indirect lighting trim 500 for converting the lightfixture apparatus 100 of the present invention into an indirect lightingfixture. The tombstone holder extension 516A is inserted into thedesired lamp length slot 232B, 232BB [see FIG. 4] allowing the lamps 12to be positioned to the desired heights within the fixture/troffer 200[see FIG. 1]. The lamp holders 205 are inserted into the tombstoneholder extension 516A before the tombstone holder extension cover 516 isattached. The indirect lighting trim 500 is placed onto the Shadow Box™trim 300 and secured into place with a clip device 352. The indirectreflective shield 580 is inserted into the fixture/troffer 200 andsecured into place before closing the Shadow Box™ trim 300 with theindirect lighting trim 500 attached.

FIG. 26 is a perspective view of a preferred embodiment of a ballastrail 2200 of the present invention. The ballast rail 2200 comprises aplanar portion 2202, an offset portion 2204, a lip portion 2206 and abeveled portion 2208. The planar portion 2202 has one or more ballastadjustment slots 2234A, 2234B for removeably securing a ballast to theballast rail 2200.

FIG. 27 is an end view of the preferred embodiment of the ballast rail2200 of the present invention as illustrated in FIG. 26. The ballastrail 2200 has a planar portion 2202, an offset portion 2204 and a lipportion 2206 and a beveled portion 2208.

FIG. 28 is a longitudinal view of the preferred embodiment of theballast rail 2200 of the present invention as illustrated in FIG. 26.

FIG. 29 is a plan view of the preferred embodiment of the ballast rail2200 of the present invention as illustrated in FIG. 26 engaged with acollet. The ballast rail 2200 comprises a planar portion 2202, an offsetportion 2204, a lip portion 2206 and a beveled portion 2208. The planarportion 2202 has one or more ballast adjustment slots 2234A, 2234B forremoveably securing a ballast to the ballast rail 2200. Also, a collet2240 secures the ballast rail 2200 to the housing. The configurationsillustrated in FIGS. 26, 27, 28, 29, 30 provide special and enhancedheat sink effects for the ballasts attached to the ballast rail 2200.

FIG. 30 is a plan view of the preferred embodiment of the collet 2240 ofthe present invention as illustrated in FIG. 29. The collet 2240comprises a planar member 2242, a lip portion 2246, a beveled portion2248 and one or more apertures 2249.

FIG. 31 is a perspective view of a preferred embodiment of a latch bar3100 of the present invention. The latch bar 3100 comprises alongitudinal member 3102, a latch 3104, an aperture 3106 and an angledportion 3108.

FIG. 31A is a longitudinal view of the preferred embodiment of the latchbar 3100 of the present invention as illustrated in FIG. 31. The latchbar 3100 is illustrated with the angled portion 3108.

FIG. 31B is a detail view of the preferred embodiment of the angledportion 3108 of the latch bar 3100 of the present invention asillustrated in FIG. 31A.

FIG. 31C is a longitudinal, break-away view of the preferred embodimentof the latch bar 3100 of the present invention as illustrated in FIG.31. The latch bar 3100 is illustrated with the longitudinal member 3102,the latch 3104, the aperture 3106 and the angled portion 3108.

FIG. 31D is a detail view of the preferred embodiment of the latch ofthe latch bar 3100 of the present invention as illustrated in FIG. 31A.The latch bar 3100 is illustrated with the longitudinal member 3102, thelatch 3104, the aperture 3106 and the angled portion 3108.

FIG. 32A is a perspective view of the preferred embodiment of the lensreceiver guide 3200 of the present invention. The lens receiver guide3200 comprises a first member 3202, a second member 3204, where thefirst member 3202 and the second member 3204 are separated by an angle3203. The angle 3203 coincides with the angle at the corners of the lenscover, which in the present embodiment is 90 degrees. The first member3202 and the second member 3204 have corresponding apertures 3211,3111A, 3112, 3112A, 3113, 3113A. Each aperture 3211, 3111A, 3112, 3112A,3113, 3113A has a protrusion 3220 therein. The protrusion 3220 is forremoveably securing a lens clip 3300 (see FIG. 33) therein.

FIG. 32B is an elevation view of the preferred embodiment of the lensreceiver guide 3200 of the present invention as illustrated in FIG. 32A.The lens receiver guide 3200 has a first member 3202 with threeapertures 3211, 3112, 3113. The number of apertures 3211, 3112, 3113 isdetermined by the number of thicknesses of lens that will beaccommodated by the lens receiver guide 3200. In the embodimentillustrated, the three apertures 3211, 3112, 3113 correspond to lenswith thicknesses of the three gaps, G11, G12 and G13.

FIG. 32C is a plan view of the preferred embodiment of the lens receiverguide 3200 of the present invention as illustrated in FIG. 32A.

FIG. 33A is a perspective view of a preferred embodiment of the lensclip 3300 of the present invention. The lens clip 3300 comprises a basemember 3302, a side member 3304, an angled member 3306, an engagementmember 3308 and an pressing member 3310. The side member 3304 can be anyshape, e.g., round or square. The angled member 3306 has an aperture3312 therein. The aperture 3312 in the angled member 3306 of the lensclip 3300 is for receiving the protrusion 3220 in the aperture 3211 whenthe lens clip 3300 is engaged in the aperture 3211 of the lens receiverguide 3200. The lens clip 3300 is inserted for securing the lens andremoved for changing the lens.

FIG. 33B is an elevation view of the preferred embodiment of the lensclip of the present invention as illustrated in FIG. 33A.

Additional advantages and modification will readily occur to thoseskilled in the art. The invention in its broader aspects is thereforenot limited to the specific details, representative apparatus, and theillustrative examples shown and described herein. Accordingly, thedepartures may be made from the details without departing from thespirit or scope of the disclosed general inventive concept.

1. A light fixture comprising: (a) a housing having a concaved portion,the housing for receiving one or more lights in the concaved portion,(b) a ballast rail for displaced engagement with the housing on theconvexed side of the housing opposite of the lights, the ballast railfor receiving a ballast thereon, such that the displaced relationship ofthe housing and the ballast rail provides for a heat sink for theballast engaged with the ballast rail thereby increasing the efficiencyof the ballast and the light fixture.